Origins and Dexcon seem to be the events that most of us go to instead of GenCon. There are numerous reasons. For myself, I hate the way they run the Minis Hall. The last 3 times I was there, over half the Mini Hall was reserved for Clix action and everyone else was jammed together. The tables were set in long rows and you could not arrange your tables to the needed dimensions for your games -- you had a 3x6 table and that's it. The tables were set end to end in rows like cafeteria tables so you had the edge of one game bumping into the edge of another. The rows were so close together that you could not sit two large men (which many of us are) together back to back. You had to store your figs and terrain under the table where players would kick them. I asked to move to a portion of the Clix area that was not being used and was told no, that that area was reserved. When I pointed out that no one was using the tables I requested in the slot in question I was told that troublemakers would be escorted out. I live less than 4 hrs from Indy but frankly until I hear that they have had a major attitude adjustment I will travel twice the distance and even pay more for the weekend to go play anywhere else.
Where are you located and how far are you wiling to travel? I'm sure this group can point you to some good local/regional cons in your area.